Colonoscopy clinicians in Manhasset, New York

CMS lists 39 clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice who have billed Medicare for at least one colonoscopy and practice in Manhasset, New York (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Kevin Tack, MD	297	96%
Matthew Horowitz, MD	236	92%
John Costable, MD	230	92%
Felice Mirsky, MD	219	91%
Kostas Sideridis, MD	174	85%
Donald Palmadessa, MD	155	81%
Paul Berg, MD	141	78%
Chun Kit Hung, MD	138	77%
Ronald Greenberg, MD	137	77%
Keith Sultan, MD	122	72%
Bethany Devito, MD	120	71%
Benjamin Stern, DO	111	68%
Leena Sayedy, MD	110	68%
David Robbins, MD	96	63%
Larisa Garkusha, MD	83	57%
Faisal Sheikh, DO	73	51%
Kara Raphael, MD	66	47%
Michael Ashamalla, MD	64	46%
Mary Cheung, MD	64	46%
Matthew Whitson, MD	63	46%
Aditya Sreenivasan, MD	60	44%
Isabella Bergagnini, DO	51	39%
Abdallah Beano, MD	49	38%
Diana Wee, MD	45	35%
Matthew McKinley, MD	37	30%
Firrah Saeed, MD	34	28%
Craig Smolow, MD	28	24%
Steven Geier, MD	27	23%
Susan Ramdhaney, MD	24	21%
Jack Mlabasati, MD	18	18%
David Kadosh, MD	15	16%
Howard Zimmerman, MD	11	13%
Paul Broomfield, MD	1-10	13% or below
Samantha Ehrlich, MD	1-10	13% or below
Gursimran Kochhar, MD	1-10	13% or below
Jennifer Onwochei, MD	1-10	13% or below
Nitzan Roth, MD	1-10	13% or below
Sanjaya Satapathy, MD	1-10	13% or below
Samip Shah, MD	1-10	13% or below

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill. CMS suppresses counts between 1 and 10 to protect patient privacy and publishes the range instead.

Reported in previous releases

CMS does not report a colonoscopy volume for these clinicians in the October 2, 2026 release. Their pages show figures from earlier releases.

Christian Kuntzen, MD Last reported August 18, 2026

Understanding CMS Data

CMS's "Colonoscopy" category combines specific billing codes for colonoscopy to calculate the number of times each clinician billed Medicare for a "Colonoscopy." These include screening colonoscopy, diagnostic colonoscopy, and colonoscopy with biopsy or polyp removal. CMS's list also includes flexible sigmoidoscopy and laparoscopic appendectomy, so a clinician's count may include those procedures. CMS counts one procedure per patient per day, so a colonoscopy that included both a biopsy and a polyp removal counts once. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of colonoscopies a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (October 2, 2026 release).